Hinge



Jan. 31, 1956' F. F. GRAVELLE ET AL HINGE Filed March 26, 1947 NVENTORS Frank F mil/em Thaoclore Wqape,

Fatented Jan. 31, 1950 HINGE Frank F. Gravelle and Theodore Thape,

Rochester, N. Y.

Application March 26, 1947, Serial No. 737,208

1 Claim. 1

Butt hinges have heretofore been made with leaves of a certain thickness. Each of these leaves is perforated with screw holes to receive a certain number of screws by which the leaf on one side is fastened to the door and on the other side to the door frame or jamb. As the leaves of butt hinges are necessarily more or less thick it has been necessary, heretofore, to mortic them into the woodwork; that is to say, out out the woodwork both of the door frame and of the door so that the edge of the door, when closed will come close to the upright of the door frame and not leave an unsightly opening between them.

The object of this invention is to make a hinge with a part of each leaf on the hinge made relatively thin so that the woodwork need not be morticed to receive the leaves of the hinge into the woodwork.

For this purpose each leaf is made thin by making it shallow where it contacts with the woodwork and by forming each leaf so that around the three outer edges of the shallow part of each leaf a knife edge is formed, which knife edges are connected by a web, which forms part of the leaf of the hinge. This web is provided with screw holes.

Another object of the invention is to form the knife edges on three sides of the shallow part of each leaf so that they can be driven into the woodwork to which they are to be attached, thus avoiding the need of any morticing of the woodwork or greatly reducing the amount of the morticing, thus simplifying the hanging of the door.

Another object of the invention is to provide lugs on the inner edge of the shallow part of the hinge, which will engage the edg of the woodwork to which the hinge is to be applied and will indicate the correct location of the leaf of the hinge on the woodwork before the leaf is ham mered in place on the woodwork. These lugs will be on the thick part of the hinge and will be on a line parallel both to the axis of the pin on which the leaves swing and to the outer cutting edge of the leaf. Both leaves of the hinge will be alike in this respect and either leaf can be applied to the door and the other leaf can be applied to the door frame.

These and other objects of the invention will be illustrated in the drawing, described in the specification and pointed out in the claim at the end thereof.

In the drawings:

Figure 1 is a view of the inside of an assembled hinge made according to our invention.

Figure 2 is an enlarged view in section on the line 23:, 2x of Figure 1 of one of the leaves of the hinge containing our invention applied to the jamb of the door frame preparatory to driving it into its final position.

Figure 3 is a sectional view of the same parts shown in Figure 2 with the knife edges of the leaf of the hinge driven to its final position and fastened therein by screws shown in dotted lines.

Figure 4 is a section on the line 45c, ta of Figure 1 showing a knife edge of the leaf of the hinge in section and enlarged several times.

Figure 5 is a top plan view of the complete hinge connecting the door and the jamb, the door and the jamb being shown in section on a line taken above the hinge.

In the drawings like reference numerals: indicate like parts.

In the drawings reference numeral l indicates one of the leaves of the hinge, and reference numeral 2 indicates the other leaf of the hinge. It will be seen that leaf I is made with three bearings and leaf 2 with two bearings and these bearings are connected by a pin 3, which passes i through a hole in each of the five bearings. The

bearing at the bottom of the leaf I is closed by a plug 4.

As shown in Figures 2, 3 and 4 each leaf instead of being of uniform thickness, as such hinges have heretofore been made, is now made with a thick part 5 and a shallow part 6, which shallow part is surrounded on three sides by a knife edge 7, 8 and 9. This knife edge is shown on one leaf at 1, 8 and 9 and on the other leaf at III, II and i2. The thick part of th one leaf is indicated at 5 and the thick part of the other leaf is indicated at 5a. On the edge of the thick part of the leaf of the hinge two lugs l3 and M are provided on the one leaf and lugs I5 and I5 ar provided on the other leaf. The plane of these lugs is parallel to the axis of the pivot pin in each leaf, and in the leaf l are parallel to the knife edge 8 and in the leaf 2 are parallel to the knife edge ll. These lugs are adapted to be placed against the edge of the woodwork either of the door or of th frame as shown in Figure 2 and when so placed will locate the bearings for the pin of the hinge parallel to the edge of the woodwork. With the leaves of the hinge s0 placed, the knife edge is struck one or more blows by a hammer and is driven into the woodwork as shown in Figure 3 or until the shallow part of the hinge makes contact with the woodwork to which the leaf of the hinge is applied. The screws are then placed as shown 3 by dotted lines in Figure 3. With the leaves of the hinge applied both to the door and the jamb, then the door and the jamb can be brought together and the leaves can be fastened together by the insertion of the pivot pin 3.

It will also be understood that if the leaves of the hinges are applied to hard wood, each leaf can be struck with the hammer sufficiently to mark the outline of the knife edges on the woodwork, after which the leaf can be removed and the woodwork can be roughed out on the lines marked by the knife edges, thus simplifying'th'e driving of the leaf of the hinge into the woodwork. It is believed that in soft wood this roughing out would not be necessary but in any case it is easier to rough out for the knife edges than to mortice out for the whole leaf of the hinge.- This would save much time in the hanging of the door and would secure more accurate fitting of 4 with the bearings of the other leaf, each leaf having a thick portion parallel to said bearings and a thin portion parallel to said thick portion, the thick portion being placed between the thin portion and the bearings, the thin portion of each leaf being surrounded by a knife edge on REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 539,057 Ivins May 14, 1895 FOREIGN PATENTS Number Country Date 551,114 France Dec. 26; 1922 

